Piston-bearing oiler.



PATNTED JUNBZ, 1970.3.

H. H. BUFFUM. PISTONFBBARING OILBR. APPLIoATIoN FILED lgov. '1, 1,902.

NO MODEL.

UNITED STATES Patented J une 2, 1903.

PATENT OFFICE.

PlsToN-BEARINatoli-LER;

SPECIFICATION forming part of`Letter's .Patent No. 72549537, dated June 2, 1903.

Application ined Ntv'mber 7, 1902. serial No. 130,420. (No mode1 To all whom t .may concern:

Be it known that I, HEREERT r1. BUFFUM, of Abington, in the county of Plymouth and State of Massachusetts, have invented cer- .tain new and useful Improvements in Piston- Bearing Oilers, of which the specification. y

This invention relates to oiling devices for the wrist connection between the pitman and piston in engines employing trunk-pistons. Owing to the secluded locality of this bearing following is a it has heretofore been a matter of difficulty*v represents a vertical section-of the same,

Fig. 3 shows a sectional-view ofthe cylinder with the piston broken away and in section at one side of its central plane. Fig. 4 represents aview, mainlyin section, on the horizontal plane of the piston and cylinder. Fig. 5 represents a section on line 5 5 of Fig. 2 on a reduced scale. 6 represents a detail section on line 6 6 of Fig. 3.

The same reference characters indicate the saine parts in all-the figures.

In the drawings, 10 is the cylinder of a sin-- gie-acting ell-gine, such asan explosion-engine, 11 is a trunk-piston within the same, of the usual cup shape, provided with packingrings 12 l2, and 13-is' a pitman or connectingrod, to which is clamped a pin 14, the ends of which form journals, mounted in bearings 15 15 on the piston. The upper wall of eachl of these bearings is bored through with avertical funnel-shaped duct 16 to receive the oil.

17 is an oil-cup screwed'in the upper-wall of the cylinder 10 for distributing oil upon the periphery of the piston 11 to lubricate its passage back and forth in the cylinder.

duct 18 is formed on the upper side of the lip of piston 11 with the apex of the V extended toward the cylinder-head and its two limbs terminating near the outward edge or margin A V-shaped open channel or surface y of the piston. vAt the ends of this duct short holes 19 19 are bored in the shell of the pis- *ton 'and connectsaid duct with the interiors v,of two inclined tubes 20 20, screwed in lugs 21 21, cast on the lip of the piston and having their lower ends residing in the mouths of the ducts 16. The surface duct 18 need not reach or pass underneath the outlet of oil-cup 17, but may be some distance forward of said oil-cup atits nearest approach thereto, asindicated in the drawings. By reason, however, of capillarity, inertia, and otherforces acting onthe oil the latter will be distributed throughout the length of the piston 11 and over the inner surface of the cylinder, and a portion thereof will fill the duct 18 and ow through the tubes 20 20 and into the ducts 16 16, so as to eifectively lubricate the bearings of the pin-14. Y v

I do notconne myself tothe exact details of construction herein described, as various inodicationsvmay be made within the scope of the invention.

I claim- 1. In a piston-bearing oi1er,the combination.

of a cylinder, a trunk-piston therein having a packed zone, a pitman, a journal and bearing vconnecting said piston and pitmanand located'opposite said packed zone, means to supply lubricant Vto the periphery of said piston, and a lubricating-channel leading from a pointY on the piston periphery forward of said packed zone 4longitudinally of the piston to said journallandvbearing.

2. In a piston-bearing oiler,the combination of a cylinder, a trunk-piston therein, a pitman, a journal and bearing connecting said piston and'V pitman, an oil-channel leading from the periphery of said piston to said journal and bearing and includinga tube 2O dis- `supplying lubricant to the peripheryof said HERBERT` H, lBUFFUM. Vitnesses: 'f"` i WILLIAM J. COUGHLAN, JENNIE L. BUEFUM. 

